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94 Boy Scouts Now all owls swallow their prey whole, and in digesting thi? food they disgorge the skulls, bones, fur, and feathem in the form of hard dry pellets. Thh boy used to go out on Saturday or Sunday afternoon and bring home his pockets full of pellets, and'then in the evening he would break them apart. In thi.? way he learned exactly wha[ the owls h4d been eating (without killing th?m) and he even discovered the skulls of certain field mice that naturalists had never known existed in. that region. He let the owi be his collector. Patrol Work It is a good idea to keep at patrol headquarters a large sheet on the wall, where a list of the year's bird observations can be tabulated. Each time a new bird is seen, its name is added, together with the initial of the observer, and after that its various occurrences are noted opposite its name. The keenest- eyed scouts are those whose initials appear most frequently in the table. In addition, the tables will show the ap- pearance and relative abundance of birds in a given locality. For patrols' of young boys, a plan of tacking up. a colored picture of each bird, as soon as it is thoroughly known, has been found very successful, and the result provides'a way to decorate the headquarters. Such pictures can be obtained very cheaply from the Perry Pictures Co., Boston, Mass., or the National Association of Audubon Societies, x974 Broadway, New York City. MOLLUSCA--She!Is and Shellfish By Dr. William He?d. zy Doll, of tk? United States Geological $u?vzy Among the shy and retiring animals which inhabit our woods and waters, or the borders of the sea, without making themselves conspicuous to man except when he seeks the larger ones for food, are the mollusca, usually con- founded with crabs and crayfish under the popular name of "shellfish," .except the few which have no external shell, which are generally called slugs. Hardly any part of the world (except deserts) is Fro. z without them, but, shy as they are, it White-lipped snail takes pretty sharp eyss?ko?O2d them. (Pol?gyra albolabris) Some come ou?ff?rhe?r'?g places